Opoku-Mensah, Dorina, Cyrus, Akili, John, Jerin et Essel, Ebenezer Ekow.
2025.
« Spacing ratio effects on the interference of three-dimensional twin synthetic jets ».
In Proceedings of the CSME-CFDSC-CSR 2025 International Congress (Montreal, QC, Canada, May 25-28, 2025)
Coll. « Progress in Canadian Mechanical Engineering », vol. 8.
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Résumé
A numerical study is performed to investigate the effects of spacing ratio (s/d = 1.2, 2.0, 3.0 and 4, where s is the center-to-center distance between the jets and d is the jet-exit diameter) on the mixing and turbulence characteristics of a circular twin synthetic jet (TSJ) using Improved Delay Detached Eddy Simulations (IDDES). The Reynolds number based on the maximum centerline jet-exit velocity was fixed at Re = 310 with an actuation frequency of 300Hz . Both the phase-averaged and time-averaged results showed that the inner shear layers of the TSJ converge at the merging point, promoting interactions within the jets, which causes the jets to combine into a single jet further downstream. The merging and combined points increased linearly with the spacing ratio. However, the velocity decay rate of each jet generally decreased as the spacing ratio increased. For s/d = 1.2 and 2.0, the merging of the jets induced an axis-switching phenomenon, which was not observed for the larger spacing ratios. Q-criterion was used to examine the three-dimensional vortical structures associated with axis-switching and interference between the TSJ.
| Type de document: | Compte rendu de conférence |
|---|---|
| Éditeurs: | Éditeurs ORCID Hof, Lucas A. NON SPÉCIFIÉ Di Labbio, Giuseppe NON SPÉCIFIÉ Tahan, Antoine NON SPÉCIFIÉ Sanjosé, Marlène NON SPÉCIFIÉ Lalonde, Sébastien NON SPÉCIFIÉ Demarquette, Nicole R. NON SPÉCIFIÉ |
| Date de dépôt: | 18 déc. 2025 15:17 |
| Dernière modification: | 18 déc. 2025 15:17 |
| URI: | https://espace2.etsmtl.ca/id/eprint/32476 |
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